Correct Answer: Option C

Explanation

CO2 is linear because the electron pairs around the central carbon atom repel each other, forcing the two oxygen atoms to push as far as possible to either side of the carbon atom, hence its bond angle is at 180 deg; H2O is bent because of the repulsion between the oxygen atom's unshared electrons and the shared electrons between the oxygen and hydrogen atoms, and CH4 has a tetrahedral shape because of the repulsion between the four pairs of bonding electrons around the central carbon atom. 

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